7:33 AM, August 31, 2019, a power failure hit Amazon Web Services (AWS) US-East-1 datacenter in North Virginia. As expected, the datacenter’s backup generators kicked in.
Then at about 9 AM the generators started failing
The result was 7.5% of Amazon’s data storage units were unavailable for several hours. Some of the affected websites and services included Reddit, Styleseat, Fortnite, Sendhub … and many smaller sites and services. Power was restored, and around noon most of the drives were functioning. But the outage rendered some data unrecoverable. For those that had not backed up their data, the power failure was a disaster.